Wheel chock



' w. 1 LIGHTFORD. 1,762,997

WHEEL CHOGK `lune 10, 1930.

Filed Jan. 5, 1927 Patented June-101,' 193C!l v WILLIAM` L. LIGHTFORD, yor kIii1j1.a1\m1=o;trs INDINA' j r Y WHEEL Appiication mea January 5,1927. Seiai'np. 1159,03'1] lThis inventionrelates in general tomeans forplacing a chock under amoving wheel of a vehicle wherebythe rotation of fthe wheel may be stopped and anyfurther travel. of the vehicle `is arrested by vthechock fric-'1 positions substantially v-liorizontal as=lindi Vcated by the solid, lines in Fig. fwhereby" I thefpins 21 and 22 each contact the lever tionally sliding over the roadway.k

The invention is described in reference to the accompanying drawing, in which- Fig. 1, is a side elevation of a stripped automobile chassis to which myinvention is applied;V

Fig. 2, a top plan View of the chassis; Fig. 3, a side elevation' of the. chock actu? ating mechanism 5' Fig. 1,a rear elevation of the chock actuating mechanism; u

Fig. 5, a sidev elevation of a Amodified form of the chock actuating mechanism;

Fig. 6, a rear elevation of themodifiecl form; andv I V z Fig. 7 ,fa section on the line 7`7 in Fig. 3.

Like characters of reference indicatelike parts throughout the several views.

Referring particularly to Figs:` 3 andlf a vertical plate 10 is secured tothe vehicle axle 11 by anysuitable means such'as'the spring clip 52. A lever 12fis'pivotally secured byits upper end-tonear the top of the 1 plate 1() to swingjfieely 'fore and aft between the plate and thewheel 13` 0 the vehicle. l Y I" A. control hand lever 14 is pivotally mounted on the vehicle at any convenient Y point and operates through a quadrant 15.V

hand lever let' with the lever 12 'at' apoint below its center'oifl rotation sothat a sub-` stanti al length of the lever 12 extends downr wardly from the point at which the rodY 16 connects with it. y .Y Two arms 17 and 18 are pivotally carried on the plateV 10, -one extending to the rear and the other forwardly. `The arm 17 has a short upturned arm 19 projecting upwardlyl and rearwardly, andrsimilarly, the arm 18 has a short arm 20 projecting upwardly and forwardly toward the arm 19. Pins 21 and4 22 extendifrom the arms 19A and 20, one on either side of the lever 12 whereby any rocking of the lever 12 will rock either arm 17 A connecting rod 16interconnectsy the@ or18v as the 'leverVA 12v may bejmoved.Ar` Itjis".V to be notedr thatthe' arms 17 and 18'swingy 'eccentrically'witli the travel of the wheel .13.'

V` l'tor'sion spri'11g123 rtendsr to'hold the arms 17 "and-18"in the 'normal inoperative The longarms 17-and 18 each carry strapsj 21 and l25 which 'serve .asv retaining 'guides-72 to 'slid'ably carry the extension legs QGancl i 27 each` oli which' legs are 'retainedby' meansvr of the springs 25E-'bearing vbetween alpin 29T through each leg and against the outer strapv- 25, `whereby the legs may yieldingly be eX- 6&3 tended an appreciable distance.

Achock orfshoe is carried on the outer` Y endofveach leg 26 'and 27, each shoe'having a. straight portion a below the leg, andy incurving portion b viewed-in Fig. 3.V f'

Y In both Figs. fandffthewheel ljhas been'removed to disclose the mechanismgfand' y its relative fp ositionvis indicate'chbyA dash1 linessffz ,LM v .f Assus'fnilngf thevehicle to '.be inisome' suchff position as in climbinga hill? andthe motive power'fails,-and Vthe brakes :lailtohold thel "fi vehicle from rolling'backwardly down the hill, =my invention then serves vfto great ad- 7 gs.

ltheshoe 3() willvcontact the wheelti'reinthe gg. i

position 3Q', and asl the wheel isfrollirig backlwardly,tl1elshoeBOHwill be carriedby frictional engagement, down and under 'the' wheel 13 to the lowerpositionasindicated by the clashflines where V*the arm 18 c is 9F stopped'by VAthe bumper block 324 carryingn the'intervening bul'er* spring?) to hold the f shoe 30 under the wheel. n, A ff j g?" Theshoe 30 is held in engagementfwith c the wheel tire byJtli'e yielding of' the spring @11V 28 which pemits theleg' 27to `eXtendto let the shoe 4` 30 follow "the periphery of the wheel," and the wheel to actually roll upfon.

the shoe andthere remain." The motion of theyvehicle issoon vrarrested byl-thel' shoe f30f nl@ #above the` leg Y las'fj 'me Y frictionally engaging the roadway. All sliding is taken on the shoe so that no damage is done to the wheel or tire.

' To remove the shoe 30 from under the wheel 13, the lever 14 is released from its engaging notch in the quadrant and the vethe lever 14 rearwardly to throw down the arm 17. No great force on the lever 14 is required to vcause the shoes 30 to be positioned under the wheel. push on the lever 14 until veither shoe 30 contacts the wheel is.a ll that is necessary,

. as the shoe I30 is then carried on around by the wheel itself and not by pulling or push- Y ing onthe lever 14.

The foregoing description has been applied topone rear .wheel only. In practice,

lhowever, to avoid skidding, I provide means i for operating shoes on `both rear wheels,

as indicated in Figs. 1 and 2, where the actuating mechanism above described is carried at the left rear wheel 13, and rods 34 Vand 35 fixed in the rotating centers of the arms 17 and 18 extend transversely across Y to the other wheel topass through a plate 36 similar to the plate 10, and carry the arms V37 vand 38 corresponding to the arms 17 and 18, which arms in turn carry the ex- -tensible legs 39 and 40 and the shoes 41.

A1 modification of the arm actuating mechanism is shown in Figs. 'fand 6, where, in place of the plate 10, a guide 42 carries a horizontal sliding plate 43. This plate 43 has a slot 44 in lone 1 endand a slot 45 in y the other with the central dividing`,1vertical cross-piece 46.

The pin 21. extends into the slot 44 and the pin 22 into the slot 45. The cross-piece 46 corresponds to the lever 12 in `that as the rod 16 moves the slide plate 43, the cross- Vpiece 46 will contact either pin 21 or 22 to rock the corresponding arm 17 or 18.

In Fig,J 5, the'slide plate 43 is shown pulled. forwardly to throw the arm 17 downwardly from its normal position as indicated by the dash lines. The cross-piece 46 being ahead of the pin 22, the arm 18 is not moved, but is locked against movement-as the rear end of the plate 43 comes up behind the pin 22 so that the pin 22 can not move.

I claim:

1. The combination of a wheel, an arm pivoted accentrically of the wheel to swing to the rear of the wheel, a second arm pivoted eccentrically of the wheel to swing to the front ofthe wheel, a leg slidingly 'picarried by each of said two arms, yielding A light pull orv means resisting the outward travel of the legs, a shoe on the outer end of each leg, means normally holding said arms upwardly to maintain said shoes in positions out of Contact with said wheel, selective means for dropping either of said shoes to contact the periphery of the wheel whereby the shoe actuated may frictionally engage said wheel and be carried along by the wheel, and a stop limiting the travel of the arm carrying the shoe wherebyv said shoe stops the rotation of the wheel when the vshoe contacts the ground and carries the wheel thereon.

2. The combination of a wheel, an arm pivoted eccentrically of the wheel having a short member bearing a pin, an extension leg on one side of the pivot, a shoe carried by the leg and means connected with the arm on the other side of the pivot comprising a bar manually rocked against the pin for swinging the arm to .contact the shoe with the wheel.

3. The combination of a wheel, an arm pivoted eccentrically of the wheel having a cranked member bearing a pin, a shoeA adjustably secured to the arm on the other side of the pivot, means for normally holding the arm in position with the shoe out of contact with the wheel and means connected with the arm on the other side of the pivot comprising a bar manually rocked against a pin for swinging the-arm to contact the shoe with the wheel.

4. The combination of a wheel, an arm having an inner cranked end pivoted eccentrically of the wheel, said end having a pin, a leg slidingly carried bythe arm, yielding means resisting the outward vtravel of the leg, a shoe on the outer end of the leg, means normally holding the arm up with its shoe out of contact with the wheel, means for dropping the shoe into frictional contact with the periphery of the wheel comprising a rocking lever and manually operated means for rocking the lever into contact with the pin on the arm, and means limiting the travel of the arm tostop the travel of the wheel when the shoe is on the ground under the wheel.

In testimony whereof I affix my signature.

VILLIAM L. LIGHTFORD. 

